panic: bad arg kind: goroutine 15 [running]: github.com/google/syzkaller/prog.clone(0x0, 0x0, 0xc000b2b288, 0xc003c48ea0, 0xc000b2aed0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:79 +0x91b github.com/google/syzkaller/prog.clone(0x9b46a0, 0xc001040820, 0xc000b2b288, 0xc003c196c0, 0xc000b2afd0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b46a0, 0xc001041520, 0xc000b2b288, 0x9b4620, 0xc003c67440) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b46a0, 0xc0010415c0, 0xc000b2b288, 0xc003c48de8, 0xc000b2b1d0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:57 +0x18d github.com/google/syzkaller/prog.clone(0x9b46e0, 0xc000d4d680, 0xc000b2b288, 0x9b4620, 0xc003c67420) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:44 +0x567 github.com/google/syzkaller/prog.(*Prog).Clone(0xc000d35100, 0x9014b6) /syzkaller/gopath/src/github.com/google/syzkaller/prog/clone.go:24 +0x279 github.com/google/syzkaller/prog.(*randGen).resourceCentric(0xc001a31980, 0xc001af3ef0, 0xcafba0, 0x0, 0x0, 0x0, 0xc001d95d80, 0xc000b2b528, 0x792dc9) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:839 +0xc2 github.com/google/syzkaller/prog.(*ResourceType).generate(0xcafba0, 0xc001a31980, 0xc001af3ef0, 0x0, 0x9b4620, 0xc001d95d80, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:669 +0x27c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc001a31980, 0xc001af3ef0, 0x9baae0, 0xcafba0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:658 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:608 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc001a31980, 0xc001af3ef0, 0xd46f20, 0xc, 0xc, 0xaaaaaaaaaaaaaa00, 0x38, 0x8, 0x0, 0x0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:596 +0x116 github.com/google/syzkaller/prog.(*StructType).generate(0xcbc500, 0xc001a31980, 0xc001af3ef0, 0x0, 0xd806c0, 0x0, 0x0, 0x20, 0x20) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:780 +0x7c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc001a31980, 0xc001af3ef0, 0x9babc0, 0xcbc500, 0x420000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:658 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:608 github.com/google/syzkaller/prog.(*randGen).generateArgs(0xc001a31980, 0xc001af3ef0, 0xcb7ca0, 0x2, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:596 +0x116 github.com/google/syzkaller/prog.(*StructType).generate(0xcbc6e0, 0xc001a31980, 0xc001af3ef0, 0x0, 0xd806c0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:780 +0x7c github.com/google/syzkaller/prog.(*randGen).generateArgImpl(0xc001a31980, 0xc001af3ef0, 0x9babc0, 0xcbc6e0, 0xd80000, 0x0, 0x0, 0x0, 0x0, 0x0) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:658 +0x450 github.com/google/syzkaller/prog.(*randGen).generateArg(...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/rand.go:608 github.com/google/syzkaller/prog.(*UnionType).mutate(0xcb76e0, 0xc001a31980, 0xc001af3ef0, 0x9b4760, 0xc001a31040, 0xc001a67ee8, 0xcb76a0, 0x2, 0x2, 0xc0020dd380, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:457 +0x178 github.com/google/syzkaller/prog.(*Target).mutateArg(0xc0000e89c0, 0xc001a31980, 0xc001af3ef0, 0x9b4760, 0xc001a31040, 0xc001a67ee8, 0xcb76a0, 0x2, 0x2, 0xc0020dd380, ...) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:229 +0xe3 github.com/google/syzkaller/prog.(*mutator).mutateArg(0xc000b2bec0, 0xa) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:182 +0x288 github.com/google/syzkaller/prog.(*Prog).Mutate(0xc002174900, 0x9add20, 0xc002e38210, 0x14, 0xc0032f8000, 0xc002ac2000, 0x2718, 0x3000) /syzkaller/gopath/src/github.com/google/syzkaller/prog/mutation.go:47 +0x32c main.(*Proc).loop(0xc002e18840) /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/proc.go:95 +0x434 created by main.main /syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:260 +0x1188